Terahertz magnetic field induced coherent spin precession in YFeO3

Zhou, Runze; Jin, Zuanming; Li, Gaofang; Ma, Guohong; Cheng, Zhenxiang; Wang, Xiaolin

doi:10.1063/1.3682082

Cited by 60 publications

(43 citation statements)

References 27 publications

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“…By analyzing absorption peaks in the normalized Fourier spectra of the pulses transmitted through the sample, one can obtain information about the spectrum of THz excitations in the sample. The details of the time-domain THz spectroscopy setup can be found elsewhere [22][23][24][25][26][27]. We analyze the THz transmission through the sample in terms of the normalized loss function σ (ω), defined as…”

Section: Appendixmentioning

confidence: 99%

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Terahertz emission spectroscopy of laser-induced spin dynamics inTmFeO3andErFeO3orthoferrites

et al. 2014

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Using the examples of laser-induced spin-reorientation phase transitions in TmFeO 3 and ErFeO 3 orthoferrites, we demonstrate that terahertz emission spectroscopy can obtain novel information about ultrafast laser-induced spin dynamics, which is not accessible by more common all-optical methods. The power of the method is evidenced by the fact that, in addition to the expected quasi-ferromagnetic and quasi-antiferromagnetic modes of the iron sublattices, terahertz emission spectroscopy enables detection of a resonance optically excited at an unexpected frequency of ß0.3-0.35 THz. By recording how the amplitude and phase of the excited oscillations depend on temperature and applied magnetic field, we show that the unexpected mode has all the features of a spin resonance of the Fe 3+ ions. We suggest that it can be assigned to transitions between the multiplet sublevels of the 6 A 1 ground state of the Fe +3 ions occupying rare-earth positions.

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Section: Appendixmentioning

confidence: 99%

“…It has been demonstrated that broadband pulses of THz radiation can serve as a probe of spin resonances in YFeO 3 [22][23][24], ErFeO 3 [25], NdFeO 3 [26], and Tb 3 Ga 5 O 12 [27]. A promising approach to control magnetic order with the help of intense-enough THz pulses has been suggested for NiO [28].…”

Section: Introductionmentioning

confidence: 99%

Terahertz emission spectroscopy of laser-induced spin dynamics inTmFeO3andErFeO3orthoferrites

et al. 2014

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“…The slower decay of the component polarized along the a axis means that the initially circularly polarized FID signal becomes increasingly elliptical over time, with the long axis of the ellipse oriented along the a axis of the crystal. 26 Extrapolating this trend to long time delays, a nearly linearly polarized THz wave, i.e., a wave radiated by a linearly oscillating dipole (e.g., optical phonon), survives. However, this linearly polarized signal still oscillates at the Larmor frequency, i.e., at the frequency of the precessing magnetic dipole.…”

Section: Data Analysis and Discussionmentioning

confidence: 99%

“…16,17 Recently, the ultrafast THz spectroscopy also proved to be an effective experimental method of detection and manipulation of magnetization in materials utilizing the magnetic field component of the THz transient through magnetic dipole transitions. [18][19][20][21][22] In this fashion, the ultrafast magnetization dynamics in ferromagnetic (FM) 23 and antiferromagnetic (AFM) materials [24][25][26][27] have been investigated.…”

Section: Thz Excitation and Coherent Control Of Spin Resonances Vmentioning

confidence: 99%

“…As a result of the impulsive Zeeman torque, the tilted macroscopic magnetization vector M starts precessing around its unperturbed orientation at the Larmor frequency, leading to circularly polarized electromagnetic emission E THz ∝ ∂ 2 M/∂t 2 (where t is time) from the rotating magnetic dipole, in the direction of an unperturbed M vector, at the Larmor frequency. [24][25][26][27] The excitation of spin waves by an impulsive, (sub-) picosecond, magnetic field transient can be considered quasiinstantaneous. However, the natural decay of the spin waves, which can be assigned to magnon-magnon or magnon-phonon interactions, 25,28 usually takes place on the timescale of tens to hundreds of picoseconds.…”

Section: Thz Excitation and Coherent Control Of Spin Resonances Vmentioning

confidence: 99%

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Single-pulse terahertz coherent control of spin resonance in the canted antiferromagnet YFeO3, mediated by dielectric anisotropy

Jin

Mics

et al. 2013

Phys. Rev. B

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We report on the coherent control of terahertz (THz) spin waves in a canted antiferromagnet yttrium orthoferrite, YFeO3, associated with a quasiferromagnetic (quasi-FM) spin resonance at a frequency of 0.3 THz, using a single-incident THz pulse. The spin resonance is excited impulsively by the magnetic field component of the THz pulse. The intrinsic dielectric anisotropy of YFeO3 in the THz range allows for coherent control of both the amplitude and the phase of the excited spin wave. The coherent control is based on simultaneous generation of two interfering phase-shifted spin waves whose amplitudes and relative phase, dictated by the dielectric anisotropy of the YFeO3 crystal, can be controlled by varying the polarization of the incident THz pulse with respect to the crystal axes. The spatially anisotropic decay of the THz-excited FM spin resonance in YFeO3, leading to an increasingly linear polarization of the THz oscillation at the spin resonance frequency, suggests a key role of magnon-phonon coupling in spin-wave energy dissipation. 2013 American Physical Society. We report on the coherent control of terahertz (THz) spin waves in a canted antiferromagnet yttrium orthoferrite, YFeO 3 , associated with a quasiferromagnetic (quasi-FM) spin resonance at a frequency of 0.3 THz, using a single-incident THz pulse. The spin resonance is excited impulsively by the magnetic field component of the THz pulse. The intrinsic dielectric anisotropy of YFeO 3 in the THz range allows for coherent control of both the amplitude and the phase of the excited spin wave. The coherent control is based on simultaneous generation of two interfering phase-shifted spin waves whose amplitudes and relative phase, dictated by the dielectric anisotropy of the YFeO 3 crystal, can be controlled by varying the polarization of the incident THz pulse with respect to the crystal axes. The spatially anisotropic decay of the THz-excited FM spin resonance in YFeO 3 , leading to an increasingly linear polarization of the THz oscillation at the spin resonance frequency, suggests a key role of magnon-phonon coupling in spin-wave energy dissipation.

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Observation of Antiferromagnetic Magnons and Magnetostriction in Manganese Oxide Using Terahertz Time-Domain Spectroscopy

Moriyasu

Wakabayashi

Kohmoto

2013

J Infrared Milli Terahz Waves

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Terahertz magnetic field induced coherent spin precession in YFeO3

Cited by 60 publications

References 27 publications

Terahertz emission spectroscopy of laser-induced spin dynamics inTmFeO3andErFeO3orthoferrites

Terahertz emission spectroscopy of laser-induced spin dynamics inTmFeO3andErFeO3orthoferrites

Single-pulse terahertz coherent control of spin resonance in the canted antiferromagnet YFeO3, mediated by dielectric anisotropy

Observation of Antiferromagnetic Magnons and Magnetostriction in Manganese Oxide Using Terahertz Time-Domain Spectroscopy

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